They replaced trams by buses.他们用公共汽车代替了电车.Trams in London have been supplanted by buses.伦敦的电车已经由公共汽车取代了.He economized by using trams instead of taking a taxi every time he went to school.他上学搭电车而不坐出租汽车,以节省钱....
The lawn needs mowing.这草坪的草该割了.They are lying on a grassy lawn.他们躺在绿草如茵的草坪上。The traditional lawn has been replaced by low-cost terracing, with a raised pool and waterfall.传统的草坪已经被低成本梯田所取代，梯田上有个高位水塘和瀑布似的水流。She ran swiftly...
挤压 式 发动机对推进剂中溶解的气体特别敏感.Pressure - fed engines are particularly susceptible to dissolved gas in the propellants.石墨甚至其线性类似物, 聚 ( 名聚-苯撑 ) 都是极难溶解的.Graphite and even its linear counterpart, poly ( p - phenylene ) are too inso...